New guy attempt at F2 Tecno 69 go kart

[EC1]

Hi all! Rather than being an observer, I would like to participate with you guys!

I love the Lotus open wheel formula cars of the 60's and chose to model a little go kart for my young sons after the Tecno 69 F2.

http://www.race-cars.com/carsold/other/1168718230/1168718230pp.htm

Well, I'm now at this stage and can post pics of the beginning if anyone is interested.

A few pictures:

 

[bighead]

Heck yah post em up.

 

[EC1]

I started with a YZ/DT400 Yamaha to a locked independent equal a-arm suspension. Axles from the rear of a Subaru Justy, via chain drive. The wheels and tires were originally 205/50/10's with a goal weight of under 150 lbs. I kinda started knowing my kids wouldn't drive it for a few years but I went with something they could use.

I went with 5" go kart racing wheels and tires, without any rear suspension at all - "for the childrens." The motor is now a B&S 5hp.

The front suspension pivots behind the seat at the base of the roll hoop. (2) 650lb/in Shocks and springs are from a mountain bike. Overall front suspension travel is roughly 1 inch...

 

[fl250540]

looks good so far.

 

[landuse]

Nice work. Your kids are going to love you. Have you got a lot of space to ride around on?

 

[EC1]

Thanks for the kind words Mr landuse. My kids love to see something sketched on a napkin in the morning and created later that day (brackets, hubs...). I hope they figure out sooner than later if you can dream something up - it can be built.

There are many parking lots around to mess around at. They think we're going to enter a race and beat other race cars!

 

[Doc Sprocket]

How cool is that? Nice work!

 

[EC1]

Seat frame work: sketch > materials > rough finish

 

[EC1]

more inspiration...

 

[EC1]

fiberglass work (I can't find all of them but here is an overview)...

Wood buck (sp?) > finished fiberglass cone. Note that this took from CAD dwgs to really unfinished (3 cloth layers) fiberglass a total of 1 month!

I extrapolated (AutoCAD 2D) side and front views 1:1 to cut aways plotted 1:1. I transferred the patterns to plywood for the buck now stored above (as seen). My plan was to make it the full length of the body but decided to do this in parts...

I dare not throw away that buck - one day I might make it big, making that "hand made" creation worth something!!!

A lot of trimming and fitting yet to go...

 

[EC1]

The two buck patterns; 1 is the top, the other (bottom) wasn't needed in the end. I'm using sheet steel to round things out. It'll give me more areas to attach the cone.

 

[EC1]

...back tracking to the very beginning (years ago!)

This is what remains on the garage floor where I sketched original side views, to get a scale of the build size. I took a picture of this and scanned it into CAD. I did some clean up and finalized dimensions to print 1:1 images for the frame and wood buck.

 

[EC1]

again a little history prior...

Here is my original layout (YZ/DT400 30+ hp w/ 205/50/10's). This is what I had in mind originally (see first post). My lovely niece gives a sense of scale:

I like it but it's really too much for my kids considering other things. Thus my decision to stay with the smaller wheels and motor.

 

[EC1]

Future paint job scheme: Gulf Oil

Is this blastphemous in any way? I really don't know the history of that paint scheme, I just think it looks cool.

 

[landuse]

You sir do some brilliant fabrication work. That seat came out perfectly. I really like the race car feel about this build. I look forward to seeing it finished.

How long do you think you still have to go before you are done?

 

[EC1]

Slow progress...

First time with wheels and tires mounted confirming 1" ride height. Maybe it's too low!

Adjustable seat with rails taken from a wrecking yard, car unknown... Works pretty well.

 

[EC1]

Seat rails mounted

Rails mounted and gives roughly 5 inches of adjustment

 

[EC1]

Height adjustable front end

Vertical tie rod to change ride height

 

[EC1]

Front suspension

Top view of front end

 

[DeathStarr89]

Looks great man!

I will confirm that 1" ride height is rough on the butt, depending on where you're riding you may want a little taller tire.

Lowest point on mine is about 1.5" and i get stuck on bumps if i'm not going fast enough. Thank god for skid plates.